@article{bwmeta1.element.bwnjournal-article-smv70i1p1bwm,
author = {Andrzej Pokrzywa},
title = {Method of orthogonal projections and approximation of the spectrum of a bounded operator II},
journal = {Studia Mathematica},
volume = {69},
year = {1981},
pages = {1-9},
zbl = {0509.47010},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv70i1p1bwm}
}
Pokrzywa, Andrzej. Method of orthogonal projections and approximation of the spectrum of a bounded operator II. Studia Mathematica, Tome 69 (1981) pp. 1-9. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv70i1p1bwm/